The climate in Quarteira during September can be summarized as warm and dry.
September is in the fall / autumn in Quarteira and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around a comfortable 27°C (80°F), whilst at night 17°C (62°F) is normal.
| Daytime temperature | 26.5°C 79.6°F | 
|---|---|
| Nightly temperature | 16.8°C 62.2°F | 
| Average temperature | 21.6°C 70.9°F | 
| Daily sunshine | 9.6 hrs | 
| Avg rainfall | 15 mm 0.6 ins | 
| Rainy days | 2 days | 
| Sea temperature | 21°C 69.9°F | 
| Humidity | 65% | 
| Windspeed | 13kph 8 mph | 
On average September is the 3rd driest month of the year in Quarteira with around 15mm 0.6 inches of rain making it a dry time to visit. This rainfall is typically spread over 2 days, although this may vary considerably.
On the flip side this corresponds to an average of 9.6 hours of sunshine per day.
 
				 
						 
						The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Quarteira in September 2025.
Best places to visit in September
| Hottest month: | August | 28°C 82.4°F | 
|---|---|---|
| Driest month: | July | 2mm 0.1ins | 
| Sunniest month: | August | 12hrs | 
| Coldest month: | January | 15.4°C 59.7°F | 
| Wettest month: | December | 100mm 3.9ins | 
 
	 
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